Automobile-jack.



a W. O. BOULDIN.

AEITOMOBILB JACK. APPLICATION FILED AUG. 29, 1912.

Patented Oct. 7, 1913.

Inventor Attorneys UNITED STATES PATENT orrron W, GLAUGETGN BQULDIIN, QB OAKLAND, TEXAS.

AU'IFOIQBILBJLCE 1,074,690, Specification of Letters Iatnl. Patented O t, '1, 1913',

.- Wcaflonflled August 29, mm soon it. 717,811.

To-all it mayraoaeem." piece 6- The bars 5 are also connected by Be it known that. 1,. W; Qmuomron Bounnm, a citizen 015 the United S a es,

residing at Oakland, in the county o5 Colorado and Stats at Texas havo invented a new anducofiul Automobile-Jack, on which the billowing i a specificatim.

Tho'prosent. imvcntimr relates to an. autor mobi-lo jack, and. aims; to providoa. device of this character" adaptedto lie below an automobile and raise the same by a single It is. concedcdand advised by tire manu f'acturers, that tires will last much longer, it, when at rest, or in. the. garage, the weight oat-the ear or-automobileis on of the tires, so as to relieve the tires of strain. when the machine is at nest. At present it is com.- mon practice to jack one wheel at a time and to place a support under the correspending ends on the axles as the wheels are jacked up This method which is in vogue is most tedious and bmrdansomo and there' iore objectionable. I

It is also the object. ofi tho present inven: tion to provide sucha jack which shall be simple, substantial, durablo and inexpensive in constructiom. as well as convenient, scnviceablo and cflicien-t in: use

Witlr the foregoing and other objects in view which will appear as the dlcscription proceeds, the invention resides in the com,- bination. and arrangement of parts and in the details oi construction hereinafter described and claimed, it being understood that changes. in the precise embodiment of tho invent-ion herein disclosed can be made within the scope of what is claimed with out departing from the spirit at the invontiom The invention has been illustrated inits preferred embodiment in the accompanylng drawings: wherein corresponding parts have bean designatedby like reference characters, and wherein-- Figure 11 inc perspective view of the jack.

Fig. Q is a perspective; showingan auxiliary' mechanism for actuating the levers whereby the superposed is elevated. Roferring'specificall y tothc drawings, the jack embodies a base or bed trams including a pair of longitudinal bars 5, which are set on edge, and which have their upper edges connected? at one and by a cross piece 6,. at an intermediate portion by a: cross piece 6 and at the other and by a cross the rungs-7,7 and 7" complementing and arranged adqacent the respective cross pieces 6,, 6; and; 6 To the respective rungs 7 and 'Z' are pivoted the pairs of link 8: and 8- the said links being; arranged adjacent the inner faces of the corresponding bars 5. It Is to be understood that any number oflines; may be used, and that the llnks may connect the base and the frame at any desired points- The jack also embodles a superimposed frame comprising a pain oi longitudinal bars 9' com: lamenting the bars. 5; of the base and whic are com nected at one end by a rung l6 and at an intermediate portion by arung 10', which rungs 10 and 10 complement the rungs 7 and 7 oi the base. The respective pairs of links 8 and 8 are pivoted to the rungs 10- and 10 adjacent the inner faces of the corresponding bars 9.

The cross pieces 6 and 6 are so arranged that the respective pairs 0i links 8 and 8- will strike them when swung upwardly and slightlg beyond a vertical position, so. that it will appear that when the superimposed frame 15- swung upwardly to a predetermined position, the link will strike the corresponding cross pieces and limit the movemont oi the superimposed trance and prevent the same from retrograde movement.

A pair of levers 11 are pivoted or fulcrumed to the rung 7 adjacent the inner faces of the corresponding bars 5, and the said lovers are connected at an intermediate point by a rung 12, the ends of which project beyond the levers 111 vThe protruding ends oi the rung 12 are adapted to swing into notches 13- cut in the lower edges of the bars 9 at their corresponding ends, the said notches 13 providing shoulders 13*- lying in the path of the rung 12, or'the shoulders 13 and rung 12 lying inthe paths of each other. The ends oi the levers 111 are connected by a rung 114:, so) that the lovers are rigidly connccted and may be simultaneously swung.

The various aforesaid parts maybe constructed orany suitable material, such as wood, channel or angle iron, and the like, and are constructed oi sizes to suit the circumstances. It is understood that the details are left to the mechanic and that the min-on details may be alteredor deviated in order to conform to the dictates oii conveniencc or eflicienoy.

In use,.the ack is adapted to rest onthe The automobile may then be raisedor jacked up by swinging the levers 11 upwardly, in

which event, the protruding ends of the rungs 12 will strikethe shoulders 13 of the bars 9 and raise the said bars. As soon as the links 8 and 8 are swung slightly beyond a vertical position, they will strike the cross pieces 6 and 6', thereby locking the superimposed frame against retrograde movement. The bars 9 in being raised will go engage the axles of the automobile and will raise the body, so that the tires free the floor or base, and-the tires are in this manner relieved of the weight of the car body and are under no strain other than the pressure of air within same. The disintegration or deterioration of the tires is thus avoided while the car is at rest, and the objects aimed at are thus carried out.

- When the automobile is to be lowered onto the floor or base, the levers 11 are swung toward the floor so that the rung 12 disengages the notches 13, it then being an easy matter to push the automobile in a'direction so that the links swing away from the. corggresponding cross pieces and'permit the automobile to run-onto the floor in an easy and convenient manner.

' This jack is adapted for use in garages;

and the like, and is susceptible of being'employed for divers purposes, such as will be apparent.

, .When a heavy car is to be jacked up, the structure shown in Fig. 1 may not be capable of manual manipulation to accomplish the desired result. Under such circumstances, an auxiliary structure shown in Fig. 2, may be employed, the auxiliary structure constituting, to all intents and purposes a part of the device which is shown In F1 1.

Rez erring to Fig. 2 there is shown a ratchet bar 28 having at one end, diverging arms 26, provided with notches 27, adapted to engage with the rung 7', the bar 28 thus constituting a part of the base or bed frame. The invention further includes a lever 29, hereinafter referred to as the secondary lever, the lever 11-11l4-constit'uting the prima lever. .The secondary lever 29 is go pivotal y connected as indicated at 30, be-

' tween the side strips 25 of an inclined thrust member 31, and the strips 35 are provided with notches 32 at the upper or front ends adapted to receive the rung 14, thereby to eonnect the thrust member 31 pivotally with the primary lever 1111--14. 'The rear or lower ends of the side strips 35' straddle the ratchet bar and are prolonged, and are curved upon their lower edges, to form floor engaging feet 36. The pivot element 30 which connects the thrust member 31 with the secondary lever 29 serves also as a support for a relatively short, loop-shaped pawl 33 which is adapted to engage the ratchet bar 28. Another, longer, loopshaped pawl 34 is pivoted to the lever 29 as indicated at 34; and straddles the thrust member.

When the apparatus shown in- Fig. 2 is employed for elevating a heavy car, the secondary lever 29 is swung to and fro, the pawls 33 and 34 engaging alternately with the ratchet bar 28 and imparting step by step movement to the thrust member 31-, the thrust member engaging the rung l4; and serving to swing the primary lever to the elevated position shown in Fig. 2, the frame rising away from the base, and serving to jack up the car. During the foregoing operation, the feet 36 which lie along opposite sides of thebar 25, will ride along thefloor or other support. After the primary lever has been raised, the thrust member may be detached therefrom and together with the secondary lever and the pawls may be removed so that when the automobile is to be lowered, there will be no obstruction. Also, when the device is not in use, the ratchet bar may be detached from the base and the whole may be compactly stored.

What is claimed as new is:

1. In a device of the character described,

a base, a frame, links connecting the base to ride on a surface, an auxiliary lever piv-. oted to the thrust member, and ratchet bar engaging pawls pivoted to the lever and thrust member.

3. In a device of the character described, a ,base, a frame, links connecting the base and frame, a lever pivoted to the base for raising the frame, a ratchet bar connected to the base, a thrust member embodying side strips engaged to the lever at one end with the other end straddling the ratchet bar to ride on the floor, an auxiliary lever pivoted between the strips, and ratchet bar engaging pawls pivoted to .the auxiliary lever and thrust member.

4. In a device of the character described, a base, a frame, links connecting the base and frame, a lever pivoted to the said base for raising the same, a ratchet bar connected to the base, a thrust member embodying side strips engaged to the said lever with their rear ends straddling the ratchet bar to ride on the floor, an auxiliary lever pivoted between the strips, a looped pawl pivoted to the auxiliary lever and straddling the thrust member to engage the ratchet bar, and a looped pawl pivoted to the thrust member to engage the ratchet bar.

5. In a device of the character described, a base embodyin an end rung, a frame, links connecting t e base and frame, a lever pivoted to the said rung for raising the same and embodying a rung at its free end,

a ratchet 'bar connected to the said rung of thebase, a thrust member embodying side strips having notchesat one end to engage the said rung of the lever, the other ends of the strips straddling the ratchet bar and formed into feet to ride on the floor, an auxiliary lever pivoted between the strips, a looped pawl pivoted to the auxiliary lever and straddling the thrust member to engage the ratchet bar, and a looped pawl pivoted to the strips to engage the ratchet bar.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

W.- CLAUGHT ON BOULDIN. Witnesses: R. J. WILLIAMS,

H. BRASHER. 

